Costain is planning a series of full weekend road closures of the A465 Heads of the Valleys trunk road as part of the on-going road dualing scheme.

The dates and times are:

6am on Saturday June 18 to 6am on Monday June 20.

8.30pm on Friday July 1 to 6am on Monday July 4.

8.30pm on Friday July 8 to 6am on Monday July 11.

The construction team will be working at high level above the carriageway in the Gorge in preparation for excavation and removal of rock, the rock face netting, boulders and tree stumps - between Pont Harri and Nany yr Hafod.

“We fully acknowledge the effect that these closures have on the local residents and travelling public and we are working with the local Environmental Health Officers from Monmouthshire County Council and Blaenau Gwent County Borough Council to agree the proposed operations,” a spokesman said.

“At all times emergency vehicles will be escorted through the gorge and resident crossing points will be available at Station Road, Clydach and Station Road, Gilwern.

“We will be providing a minibus service to replace the Stagecoach Service 3 on all three Saturdays.”

The Glanbaiden roundabout will be fully open, with traffic from Abergavenny being able to use the roundabout to access Gilwern and Govilon.